Advantages and disadvantages of FTTH fiber-to-the-home

Fibre (Fiber) To The Home (FTTH) is a transmission method of optical fiber communication. It is to directly connect the optical fiber to the user's home (where the user needs).

This optical fiber communication method and strategy is also different from FTTN, FTTC, HFC (Hybrid Fiber Coaxial), etc. They all need to rely on traditional metal wires, including twisted pair and coaxial cables, for "last mile" information transmission.

fiber-to-the-home

advantage

The advantages of FTTH are mainly 5 points:

First, it is a passive network, from the central office to the user, the middle can basically be passive;

Second, its bandwidth is relatively wide, and the long distance is just in line with the large-scale use of operators;

Third, because it is a business carried on optical fiber, there is no problem;

Fourth, because of its wide bandwidth, the supported protocols are more flexible;

Fifth, with the development of technology, including point-to-point, 1.25G and FTTH methods have developed relatively complete functions.

In the optical access family, there are FTTB (Fibre To The Building) fiber to the building, FTTC (Fibre To The Curb) fiber to the curb, FTTSA (Fibre To The Service Area) fiber to the service area and so on.

The optical fiber is directly connected to the user's home, and its bandwidth, wavelength and transmission technology are not limited. It is suitable for introducing various new services. It is the most ideal service transparent network and the ultimate way of access network development.

Although the development speed of mobile communication is amazing, due to the limited bandwidth, the terminal volume cannot be too large, and the display screen is limited, people still pursue fixed terminals with relatively superior performance, that is, to achieve fiber-to-the-home. The charm of fiber-to-the-home lies in its enormous bandwidth, and it is the best solution to solve the "last mile" bottleneck phenomenon from the Internet backbone network to the user's desktop.

With the upgrading of technology, the cost of fiber-to-the-home has been greatly reduced, and will soon be comparable to DSL and HFC networks, which makes the practical application of FTTH possible. In addition, FTTH technology is also used to solve the "last mile" problem in the information highway. FTTH+Ethernet is much faster than ADSL and ISDN.

shortcoming

Based on the MAC speed limit mode, the delay will increase when the broadband is full.

In terms of speed, FTTH provides a maximum of 4M uplink and 100M downlink, which is an unequal line, and FTTB is an up-down peering, with a maximum of 10M.

Advantages of Broadband Optical Fiber Access Network

As far as the world is concerned, most telecommunications companies mainly develop broadband access through ADSL. However, ADSL is a broadband access technology based on copper wire. Copper is a global strategic resource. Continuing to climb (an average annual increase of 20%-30% in recent years), the cost of ADSL lines based on copper cables is getting higher and higher, and the raw material of optical fibers is silica, which is inexhaustible in nature and is used for inexhaustible.

In fact, the current market price of optical fiber is lower than that of ordinary copper wire, and its lifespan is much higher than the latter. In the new laying of subscriber lines or the replacement of old cables, optical fibers have become a more reasonable choice, especially in the trunk section and even the distribution section. Secondly, as an active device, ADSL electromagnetic interference is unavoidable, and the maintenance cost is getting higher and higher. Optical fiber as a passive transmission medium avoids such problems.

Finally, as the fiberization process of the entire network continues to extend to the user side, the restrictions on end-to-end broadband connections are more and more concentrated in the access segment, and the uplink and downlink connection rates of ADSL cannot meet the long-term business needs of high-end users. Although ADSL2+ and VDSL2 technologies are expected to alleviate this pressure, the continued substantial improvement of their speed and transmission distance is limited, and a substantial breakthrough cannot be expected.

Obviously, with the large-scale application of optical fibers in long-distance networks, metropolitan area networks and even the backbone of access networks, the logical development trend is to continue to extend optical fibers to the distribution and lead-in parts of the access network, and finally realize fiber-to-the-home. . The key question is: how fast is the advance? This will depend on a variety of factors, including market demand, competition needs, application incentives, technological advancements, cost reductions, and the development of supporting operation and maintenance systems.